Back in 2015 (so very long ago, I know), it was reported that Martin Scorsese and Leonardo DiCaprio were developing a new film about notorious 19th century serial killer H.H. Holmes based on the Erik Larson book Devil in the White City. Although we’ve heard little about that project in the time since, it appears that Scorsese and his muse are plotting to reunite for another true-crime thriller, this one set in the 1920s and based on a book by Lost City of Z author David Grann.

That book is Killers of the Flower Moon: The Osage Murders and the Birth of the FBI — based on the title alone, you can tell it’s definitely up Scorsese’s alley. According to Variety, the director has set the adaptation as his next project after he completes The Irishman, which will begin shooting in September and continue through December for a 2018 release. That means we just might get a new Scorsese film two years in a row.

Set in the 1920s, Killers of the Flower Moon recounts the nascent days of the FBI as they investigated one of their very first cases: The grisly murders of several members of the Osage nation in Oklahoma, which occurred not long after oil was discovered on their land.

The news comes from Scorsese’s production designer Dante Ferretti, who told Variety that the director is hoping to begin filming Killers of the Flower Moon next spring. Academy Award-winning screenwriter Eric Roth (The Curious Case of Benjamin Button) wrote the script based on the book by New Yorker author David Grann. It’s not the first we’ve heard of the project, which first attracted Scorsese and DiCaprio back in April.

DiCaprio and Scorsese have teamed with Imperative Entertainment on the project, and although Ferretti seems quite confident that this is the director’s next film, Imperative’s chief financial officer John Atwood offered a more conservative statement to Variety: “We are currently conducting preliminary research on the film, but there are no formal attachments nor confirmed start date at this time.”

Scorsese is currently busy with The Irishman, the long-developing mafia drama which reunites the director with Robert De Niro and Joe Pesci (who just signed on this week after repeatedly turning it down for months), along with Scorsese first-timer Al Pacino. That film is based on the book I Heard You Paint Houses, in which former mob hitman Frank Sheeran claims to know what really happened to Jimmy Hoffa. Bobby Cannavale and Harvey Keitel are also set to star in the film, which will receive a limited, Oscar-qualifying theatrical run before debuting exclusively on Netflix.